Pros
Offices are very nice places to be due to facilities and furnishings, majority of people you work with are positive, great benefits packages including annual bonus and flexible benefit options, good holiday allowance at 28 days per year, longer if you've been there for 5 years+ Plenty of jobs available if you want to move around within the company Most teams have flexible working for at least 1 day per week
Cons
You will only go as far as your line manager permits you, in short the dept heads tend to take all the glory for your hard work instead of putting you in front of their peers to show what you can do/have done. Make sure you have a great relationship with your line manager, if not them move on. Some line managers are not interested/motivated to develop their staff, you have to push hard to get the breaks you need to progress. Too many chiefs means that there are sometimes conflicting priorities and/or too much work for too few people to achieve success.